Oil-burner.



W. R RAY.

OlL BURNER.

APPLICATION FILED JULY 23,1918.

Patented Dec. 30,1919.

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WILLIAM R. BAY, OF SAN FRANCISCO, CALIFORNIA.

OIL-BURNER.

Specification of Letters Patent.

Patented Dec, 30, 1919.

Application filed July 23, 1918. Serial No, 246,306.

To all whom it may concern:

Be it known that 1, WILLIAM R. RAY, a citizen of the United States, residing at the city and county of San Francisco and State of California, have invented new and useful Improvements in Oil-Burners, of

which the following is a specification.

This invention relates to oil burners, and particularly to burners of the centrifugal atomizing type.

One of the objects of the present invention is to provide a simple substantial motordriven crude oil burner of the rotary type, in which the oil is ejected and atomized by the combined action of centrifugal force and an air blast, and particularly to permit a double atomization of the oil and the handling of greater quantities thereof.

Another object of the invention is to provide. a novel mounting for the burner to permit it to be moved quickly to or away from the furnace opening, and also to permit the pointing of the burner or the direction of the flameto be chan ed.

Further objects will hereinafter appear.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings in which igure 1 is a plan view of the burner partly in section. Fig. 2 is a front View of the burner.

Fi 3 is a sectionahdetail view of the doub e atomizing nozzle. Referring to the drawings in detail,Aind1- sates the front end of an ordinary furnace, 2

the furnace opening, and 3 the burner in gen-" nection 10 mounted in the bearing bracket.

4-, while the opposite end is connected as at 11 with a housing 12, which surrounds an electric motor generally indicated at 13. The inner end of the airpipe is, in this instance, connected with the casing 12* by means of a swivel joint 14:, this connection being preferable, as it permits swinging or pointing of the burner proper with relation to the air pipe 5, which, in reality, serves as the supporting arm for the housing 12 and the motor 13 mounted therein. Any suitable form of electric motor may be employed, but it is preferably supported in the manner here shown, that is, the motor housing 15 is circular, and to that extent may pass through an opening 16 formed in the front face of the housing 12, the casing 15 being secured when inserted by an annular flange l7, and by a front cover plate 9,- bolts passing through the cover plate, the flange 17, and the housing 12, securing the parts in place. The motor is otherwise provided with field coils l8 and an armature 19, which, in this instance, is carried by a hollow motor shaft 20, said shaft being supported by ball bearings 21 arranged at the opposite ends of the motor casing as shown in Fig. 1.

Formed integral with or secured on the housing 12 as at 22 is an air discharging.

nozzle 23, and secured on the hollow motor shaft 20 within the nozzle is an atoinizing cup 24, to which oil is delivered by a stationary pipe 25, which asses throughthe motor shaft as shown. no, end of the pipe 25 entersthe atomizing cu 24 to permit oil to discharge therein while the opposite end of the pipe 25 is secured in the bracket 8. The passage formed in the bracket between the valve 7 and the pipe permits oil to pass through the pipe 6, and the valve 7 directly into the pipe 25 from where it discharges into the atomizing. cup 24, the amount of oil delivered being regulated by the valve 7.

For the purpose of securing the pipe centrally within the hollow motor shaft a plurality of adjusting screws27 have been provided. These screws when tightened exert pressure on one side or the other of the stationary pipe 25, and thus secures it in the central position within the hollow motor shaft, so that all danger of contact between the shaft and the pipe is obviated.

The atomization cup 24 forms one of the important features of the present invention to the extent that it is capable of more thoroughly atomizing the oil, and also of handling greater quantities of oil than heretofore been possible. The cup consists of an outer and inner shell, such as shown at 30 and 31, respectively. These shells are preferably cone shaped as shown, that is, a slight taper is provided from end to end to permit a free discharge of the oil, and a space 82 is maintained between the same. to permit oil to discharge from both shells. Oil, as previously stated, enters the inner shell 31 through the stationary pipe 25. A portion of this oil is then permitted to enter the space 32 by passing through perforations 33 formed in the inner shell. A certain proportion of the oil, however, continues to travel outwardly through the inner shell, and as both shells are rotated in unison, and at a comparatively high speed it can readily be seen that the oil when leaving the lip of either shell will be ejected by great force, due to the centrifugal action; it is thus thoroughly atomized. The oil from the inner shell discharges on the line indicated by the arrow a, while the oil from the outer shell discharges on the line indicated by arrow 6. Two separate sprays are in this manner ejected by the atomizer, and a better atomization of the oil is obtained than would be possible if the same quantity was discharged from a single shell. The oil thus discharged in the form of two separate sprays is encountered by the air discharging from the nozzle 23. This air discharges at a comparatively high velocity, and therefore, passes, through the oil spray, thus further atomizing the same, as the velocity of the air is suliicient to carry the oil in the forward direction asshown by arrow 0. The air employed for-this purpose may be supplied by a compressor or blower, and will, in this instance, pass through the swivel connection 10, the pipe 5, and the housing 12 before it can discharge through the nozzle 23. The air in passing through the housing 12 passes freely around the motor casing, and, to this extent, serves as a means for cooling the motor, and prevents thesame from becoming over heated. The small amount of heat being imparted to the air is beneficial, as it not only increases the atomizing action of the air, but it. also produces better combustion than when coolair is admitted directly to the furnace.

" The swivel connections shown at 6 and 10 permit the burner as a whole to be swung upon the pipe or arm 5 to or away from the furnace opening 2, and the swivel connection 11 permits the burner when in re 'ster with the opening to be pointed in any irection desired. This feature is a great advantage, particularly where two or more burners are employed, as it permits an even spreading of the flame or heating of the furn ace.

masses of the several parts of the burner may be such as the experience and judgment of the manufacturer may dictate.

Having thus described my invention, what I claim and desire to secure by Letters Pat- 'ent is current through the nozzle between the atomizer and the nozzle. 7

2. In a centrifugal oil burner, the combination with a nozzle, of a rotary atomizer mounted in the nozzle, said atomizer comprising an inner and outer shell, said inner shell being longer than the outer shell, means for maintaining an annular space between the inner and outer shell, means for delivering oil to the inner shell, means for by-passin a portion of said oil to the outer shell, an means for forcing an'air current through the nozzle between the atomizer and the nozzle. Y

3. Tn a centrifugal oil burner, the combination with a nozzle, of a rotary atomizer mounted in the nozzle, said nozzle comprising a pair of interspaced tapering shells, one

mounted within the other, and the innermost shell being longer than the exterior shell,

means for maintaining the shells interspaced,

ieans for delivering oil to the innermost shell, a series of perforations in the inner shell to permit a portion of the oil delivered to pass through to the outer shell, and means for forcing an air current through the nozzle between the outer shell of the atomizer-and the nozzle.

4:. A centrifugal atomizer for oil burners comprising a pair of cone shaped interspaced shells, the innermost shell being longer than) the exterior shell, means for delivering oil to the innermost shell, and means for bypassing a portion of the oil to the outer shell. 3

5. A centrifugal burner comprising a housing, a' motor within said housing, an

air discharging nozzle on the housing, a fuel atomizer'within the nozzle, means pm the motor for supporting and rotating the! atomizer, a fluid delivering pipe connected with the housing and the nozzle, a swivel mounting for the opposite end of said pipe, and means cooperating with said pipe for delivering fuel to the atomizer.

6. A centrifugal oil burner comprising a housing, an electric motor within said housing and spaced from the same, a hollow shaft in said motor, an air discharging nozzle on the housing, an atomizing cup secured on the motor shaft within the nozzle, an air pipe connected with the housing,

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a swivel mounting for said air pipe, and means for delivering oil to the atomizer.

7. A centrifugal oil burner comprising a housing, an electric motor within said housing and spaced from-the same, a hollow shaft in said motor, an air discharging nozzle on the housing, an atomizing cup secured on the motor shaft within the nozzle, an air pipe connected with the housing, a swivel mounting for said air pipe, a swivel connection between the air pipe and the housing, and means for delivering oil to the atomizer.

8. A centrifugal oil burner comprising a housing, an electric motor within said housing and spaced from the same, a hollow shaft in said motor, an air discharging nozzle on the housing, an atomizing cup secured on the motor shaft within the nozzle, an air pipe connected with the housing, a swivel mounting for said air pipe, a swivel connection between the air pipe and the housing, means for deliveringoil to the atomizer, said means comprising a stationary pipe passing through the hollow motor shaft, a second pipe connected with said pipe, and a swivel connection for said second named pipe, said swivel connection being positioned in alinement with the first named swivel connection for the air pipe.

9. A centrifugal oil hurner comprising a bearing bracket, a pair of alined swivel connections on said bearing bracket, an air plpe turnably mounted in one of said swivel connections, an oil delivering pipe turnably mounted in the other swivel connection, a' housing secured on the free end of the air pipe, an electric motor mounted within said housing and secured in the. housing, a centrifugal atomizer adapted to be rotated by the motor, means for delivering oil from the oil pipe to the centrifugal atomizer, and an air discharging nozzle secured to the housing and surroundin the atomizer.

10. A centrifugal oil hurner comprising a hearing loracket, a pair of alined' swivel connections on said bearing bracket, an air I pipe turnably mounted in one of said swivel the oil pipe to the centrifugal atomizer, an

air discharging nozzle secured to the housing and surrounding the atomizer, and a swivel connection between the end of the air pipe andthe housing to permit the position of the housing to be adjustedvwith relation to the air pipe.

11. A centrifugal burner comprising a housing, a motor within said housing, an air discharging nozzl on the housing, a fuel atomizer within the nozzle, means on the motor for supporting and rotating the. atomizer, a fluid deliverin pipe connected with the housingand the nozzle, a swivel mounting for the opposite end of said pipe, means cooperating with said pipe for delivering fuel to the atomizer, and a swivel connection formed between the fluid delivering pipe and the housing.

12. A centrifugal burner comprising a housing, a centrifugal atomizer journaled therein, means within the housing for rotatingthe centrifugal atomizer, a nozzle carried by the housing and surrounding the atomizer, a fluid delivering pipe supporting the housing, and a swivel mounting for the opposite end of said pipe.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

W. W. HEALEY, M. E. EWING. 

